Well, being single has its pros and cons.
You can focus on your work more, but at the same time, you have no one to focus on, on your spare time.
You will have more money as being in a relationship can be costly, but you'll have no one to share it with.
When you laugh, there's no one to hear. When you cry, there's no one to comfort you. If you want sex, you've only got one option, and that is fapping. (Or rubbing if you are of the opposite sex)
Whichever is more important should decide whether you're happier being single than being in a relationship.Currently I'm single, but that is nothing I can work on; I am charming, handsome and intelligent, but you don't see any line of women queuing after me; nor could I ever make one on my own. The only people I've actually felt connection to have been across the Internet, and that never works out; unless you're that smug couple on the newspaper with the headlines of "LOVE CONQUERS EVERYTHING!" (Personally I just want to beat them in the face)
It would be nice if I could have a significant other to share my awesomeness with, but that is not to be. So, I am left to my own demises, and so far I have improved, improved and improved myself with a lot of challenges, turning me into a greater person; something I could never had achieved, or even noticed the potential, had I been in a relationship.